自定义Gradle Task获取APP签名文件中 MD5、 SH

最近APP开发要求进行备案,在APP备案时要求填写MD5、SHA1、模数等信息,由于之前维护的项目众多,为方便获取快速获取,可以通过自定义Task实现。方法如下：

/**
 * 获取签名信息*/
task appSigningReport() {
    group "android"
    doLast {
        def signingConfig = android.signingConfigs.release
        def applicationId = android.defaultConfig.applicationId

        def storeFile = signingConfig.storeFile
        def storePassword = signingConfig.storePassword
        def keyPassword = signingConfig.keyPassword
        def keyAlias = signingConfig.keyAlias

        FileInputStream fis = new FileInputStream(storeFile);
        KeyStore keystore = KeyStore.getInstance("JKS");
        keystore.load(fis, storePassword.toCharArray());

        Certificate cert = keystore.getCertificate(keyAlias);
        PublicKey publicKey = cert.getPublicKey();

        def format = publicKey.getFormat()
        System.out.println("类型:" + format)

        String publicKeyType = publicKey.getAlgorithm();
        System.out.println("公钥类型: " + publicKeyType);

        if ("RSA" == publicKeyType) {
            def exponent = ((RSAPublicKey) publicKey).getPublicExponent()
            System.out.println("指数: " + exponent);

            String modulus = ((RSAPublicKey) publicKey).getModulus();
            System.out.println("模数: " + modulus);

            getDigestPair(cert, "MD5")
            getDigestPair(cert, "SHA1")
            getDigestPair(cert, "SHA-256")


            System.out.println("keystorePath:$storeFile")
            System.out.println("keystorePSW:$storePassword")
            System.out.println("aliasPSW:$keyPassword")
            System.out.println("alias:$keyAlias")
            System.out.println("packageName:$applicationId")

        }

        fis.close();
    }
}

private void getDigestPair(Certificate cert, String algorithm) {
    MessageDigest digest = MessageDigest.getInstance(algorithm)
    byte[] bytes = digest.digest(cert.getEncoded())

    StringBuilder builder = new StringBuilder()
    for (byte b : bytes) {
        String hex = Integer.toHexString(0xFF & b)
        if (hex.length() == 1) {
            builder.append('0')
        }
        builder.append(hex)
        builder.append(':')
    }

    String str = builder.toString().toUpperCase()
    println("${algorithm}: " + str.substring(0, str.length() - 1))

    BigInteger bigInteger = new BigInteger(1, bytes);
    System.out.println("${algorithm.toLowerCase()}: " + bigInteger.toString(16));
}

运行结果如下：